Intake Air Temperature (IAT) Sensor Inspection

INTAKE AIR TEMPERATURE (IAT) SENSOR INSPECTION [L3 WITH TC]

Resistance Inspection

NOTE:
- Before performing the following inspection, make sure to follow the procedure as indicated in the troubleshooting flowchart. Description and Operation

1. Disconnect the MAF/IAT sensor.

2. Measure the resistance between the MAF/IAT sensor terminals D and E using a tester.






- If not as specified, replace the MAF/IAT sensor. (See Service and Repair.)
- If the MAF/IAT sensor is normal, but the PID is out of specification, perform the "Circuit Open/Short Inspection".
Specification





Circuit Open/Short Inspection









1. Disconnect the PCM connector. (See Service and Repair.)

2. Inspect the following wiring harnesses for an open or short circuit. (Continuity check)

Open circuit

- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.

- MAF/IAT sensor terminal D and PCM terminal 1M
- MAF/IAT sensor terminal E and PCM terminal 1AR

Short circuit

- If there is continuity, there is a short circuit. Repair or replace the wiring harness.

- MAF/IAT sensor terminal E and power supply
- MAF/IAT sensor terminal D and power supply
- MAF/IAT sensor terminal D and body ground